./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:49:13,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:49:13,975 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:49:13,984 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:49:13,985 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:49:14,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:49:14,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:49:14,027 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:49:14,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:49:14,033 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:49:14,035 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:49:14,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:49:14,036 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:49:14,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:49:14,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:49:14,039 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:49:14,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:49:14,041 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:49:14,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:49:14,042 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:49:14,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:49:14,043 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:49:14,044 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:49:14,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:49:14,045 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:49:14,046 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:49:14,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:49:14,047 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:49:14,047 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:14,048 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:49:14,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:49:14,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:49:14,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:49:14,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:49:14,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:49:14,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:49:14,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:49:14,052 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:49:14,052 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:49:14,052 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2023-11-19 07:49:14,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:49:14,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:49:14,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:49:14,427 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:49:14,428 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:49:14,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-19 07:49:17,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:17,907 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:17,908 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2023-11-19 07:49:17,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/data/e46dad1e8/1cc86da368844c85ad73fa023b5023e7/FLAG27f376b67 [2023-11-19 07:49:17,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/data/e46dad1e8/1cc86da368844c85ad73fa023b5023e7 [2023-11-19 07:49:17,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:17,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:17,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:17,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:17,956 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:17,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:17" (1/1) ... [2023-11-19 07:49:17,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26b413c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:17, skipping insertion in model container [2023-11-19 07:49:17,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:17" (1/1) ... [2023-11-19 07:49:18,003 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:18,295 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-19 07:49:18,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:18,334 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:18,389 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2874,2887] [2023-11-19 07:49:18,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:18,424 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:18,425 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18 WrapperNode [2023-11-19 07:49:18,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:18,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:18,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:18,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:18,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,498 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 135 [2023-11-19 07:49:18,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:18,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:18,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:18,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:18,512 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,518 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,530 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,545 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:18,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:18,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:18,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:18,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (1/1) ... [2023-11-19 07:49:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:18,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:18,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:18,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:18,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:49:18,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:49:18,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:49:18,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:49:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:49:18,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:49:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:49:18,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:18,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:49:18,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:49:18,640 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:49:18,776 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:18,779 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:19,191 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:19,207 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:19,208 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:49:19,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:19 BoogieIcfgContainer [2023-11-19 07:49:19,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:19,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:19,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:19,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:19,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:17" (1/3) ... [2023-11-19 07:49:19,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b81db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:19, skipping insertion in model container [2023-11-19 07:49:19,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:18" (2/3) ... [2023-11-19 07:49:19,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25b81db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:19, skipping insertion in model container [2023-11-19 07:49:19,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:19" (3/3) ... [2023-11-19 07:49:19,229 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2023-11-19 07:49:19,239 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:49:19,252 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:19,253 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:49:19,253 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:49:19,428 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:49:19,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 234 transitions, 482 flow [2023-11-19 07:49:19,626 INFO L124 PetriNetUnfolderBase]: 21/232 cut-off events. [2023-11-19 07:49:19,626 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:19,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 232 events. 21/232 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 243 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-19 07:49:19,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 234 transitions, 482 flow [2023-11-19 07:49:19,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 223 transitions, 458 flow [2023-11-19 07:49:19,663 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:19,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-19 07:49:19,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 223 transitions, 458 flow [2023-11-19 07:49:19,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 223 transitions, 458 flow [2023-11-19 07:49:19,755 INFO L124 PetriNetUnfolderBase]: 21/223 cut-off events. [2023-11-19 07:49:19,755 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:19,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 223 events. 21/223 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 242 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 159. Up to 3 conditions per place. [2023-11-19 07:49:19,762 INFO L119 LiptonReduction]: Number of co-enabled transitions 3008 [2023-11-19 07:49:27,898 INFO L134 LiptonReduction]: Checked pairs total: 3462 [2023-11-19 07:49:27,899 INFO L136 LiptonReduction]: Total number of compositions: 245 [2023-11-19 07:49:27,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:49:27,923 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1853cf04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:49:27,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:49:27,930 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:49:27,931 INFO L124 PetriNetUnfolderBase]: 7/24 cut-off events. [2023-11-19 07:49:27,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:49:27,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:27,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:27,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:27,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1216028637, now seen corresponding path program 1 times [2023-11-19 07:49:27,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:27,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499785072] [2023-11-19 07:49:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:27,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:28,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499785072] [2023-11-19 07:49:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499785072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:28,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:28,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472258391] [2023-11-19 07:49:28,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:28,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:28,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:28,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-11-19 07:49:28,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:28,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:28,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-11-19 07:49:28,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:29,167 INFO L124 PetriNetUnfolderBase]: 112/192 cut-off events. [2023-11-19 07:49:29,168 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:49:29,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 192 events. 112/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 548 event pairs, 51 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 338. Up to 151 conditions per place. [2023-11-19 07:49:29,172 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 35 selfloop transitions, 1 changer transitions 5/41 dead transitions. [2023-11-19 07:49:29,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 41 transitions, 188 flow [2023-11-19 07:49:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 859 transitions. [2023-11-19 07:49:29,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44832985386221297 [2023-11-19 07:49:29,205 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 859 transitions. [2023-11-19 07:49:29,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 859 transitions. [2023-11-19 07:49:29,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:29,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 859 transitions. [2023-11-19 07:49:29,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.75) internal successors, (859), 4 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,237 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,239 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 859 transitions. [2023-11-19 07:49:29,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 41 transitions, 188 flow [2023-11-19 07:49:29,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 41 transitions, 172 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:49:29,248 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2023-11-19 07:49:29,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-11-19 07:49:29,256 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2023-11-19 07:49:29,257 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2023-11-19 07:49:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:29,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:49:29,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:29,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:29,262 INFO L85 PathProgramCache]: Analyzing trace with hash 386120865, now seen corresponding path program 2 times [2023-11-19 07:49:29,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:29,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955232038] [2023-11-19 07:49:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:29,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955232038] [2023-11-19 07:49:29,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955232038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:29,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:29,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924988211] [2023-11-19 07:49:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:29,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:49:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:49:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:49:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 479 [2023-11-19 07:49:29,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:29,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 479 [2023-11-19 07:49:29,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:29,904 INFO L124 PetriNetUnfolderBase]: 119/215 cut-off events. [2023-11-19 07:49:29,905 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-19 07:49:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 215 events. 119/215 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 682 event pairs, 67 based on Foata normal form. 5/172 useless extension candidates. Maximal degree in co-relation 466. Up to 179 conditions per place. [2023-11-19 07:49:29,910 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 31 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2023-11-19 07:49:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 179 flow [2023-11-19 07:49:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:49:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:49:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-11-19 07:49:29,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447286012526096 [2023-11-19 07:49:29,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-11-19 07:49:29,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-11-19 07:49:29,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:29,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-11-19 07:49:29,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 479.0) internal successors, (2395), 5 states have internal predecessors, (2395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,929 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 857 transitions. [2023-11-19 07:49:29,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 179 flow [2023-11-19 07:49:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:29,937 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2023-11-19 07:49:29,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-19 07:49:29,938 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-19 07:49:29,938 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2023-11-19 07:49:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:29,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:29,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:49:29,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:29,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash 123395315, now seen corresponding path program 1 times [2023-11-19 07:49:29,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101619997] [2023-11-19 07:49:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:29,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:30,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:30,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101619997] [2023-11-19 07:49:30,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101619997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:30,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:30,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:49:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115921157] [2023-11-19 07:49:30,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:30,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:49:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:49:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:49:30,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 479 [2023-11-19 07:49:30,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:30,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:30,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 479 [2023-11-19 07:49:30,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:30,159 INFO L124 PetriNetUnfolderBase]: 87/154 cut-off events. [2023-11-19 07:49:30,160 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-19 07:49:30,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 154 events. 87/154 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 418 event pairs, 24 based on Foata normal form. 16/138 useless extension candidates. Maximal degree in co-relation 348. Up to 133 conditions per place. [2023-11-19 07:49:30,163 INFO L140 encePairwiseOnDemand]: 475/479 looper letters, 26 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2023-11-19 07:49:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 153 flow [2023-11-19 07:49:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:49:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:49:30,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 664 transitions. [2023-11-19 07:49:30,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46207376478775225 [2023-11-19 07:49:30,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 664 transitions. [2023-11-19 07:49:30,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 664 transitions. [2023-11-19 07:49:30,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:30,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 664 transitions. [2023-11-19 07:49:30,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:30,179 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:30,179 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 664 transitions. [2023-11-19 07:49:30,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 153 flow [2023-11-19 07:49:30,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 150 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:30,183 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2023-11-19 07:49:30,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-19 07:49:30,185 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-19 07:49:30,189 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2023-11-19 07:49:30,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:30,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:30,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:30,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:49:30,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:30,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1414452377, now seen corresponding path program 1 times [2023-11-19 07:49:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507160902] [2023-11-19 07:49:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:30,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:30,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507160902] [2023-11-19 07:49:30,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507160902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:30,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:30,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:30,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832080319] [2023-11-19 07:49:30,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:30,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:31,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-19 07:49:31,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:31,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-19 07:49:31,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:31,475 INFO L124 PetriNetUnfolderBase]: 176/319 cut-off events. [2023-11-19 07:49:31,475 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-19 07:49:31,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 319 events. 176/319 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1110 event pairs, 34 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 263. Up to 76 conditions per place. [2023-11-19 07:49:31,479 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 73 selfloop transitions, 15 changer transitions 11/99 dead transitions. [2023-11-19 07:49:31,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 99 transitions, 469 flow [2023-11-19 07:49:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:31,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2166 transitions. [2023-11-19 07:49:31,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41108369709622317 [2023-11-19 07:49:31,489 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2166 transitions. [2023-11-19 07:49:31,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2166 transitions. [2023-11-19 07:49:31,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:31,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2166 transitions. [2023-11-19 07:49:31,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.9090909090909) internal successors, (2166), 11 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,516 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,516 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 11 states and 2166 transitions. [2023-11-19 07:49:31,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 99 transitions, 469 flow [2023-11-19 07:49:31,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 99 transitions, 443 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:31,523 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 179 flow [2023-11-19 07:49:31,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=179, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-11-19 07:49:31,526 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-19 07:49:31,526 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 179 flow [2023-11-19 07:49:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:31,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:31,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:49:31,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:31,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash 954213597, now seen corresponding path program 2 times [2023-11-19 07:49:31,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:31,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348025298] [2023-11-19 07:49:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:31,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:32,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:32,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348025298] [2023-11-19 07:49:32,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348025298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:32,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:32,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:32,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734402137] [2023-11-19 07:49:32,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:32,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:32,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:32,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:32,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-19 07:49:32,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:32,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-19 07:49:32,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:32,957 INFO L124 PetriNetUnfolderBase]: 189/341 cut-off events. [2023-11-19 07:49:32,958 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-19 07:49:32,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 341 events. 189/341 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1199 event pairs, 26 based on Foata normal form. 13/332 useless extension candidates. Maximal degree in co-relation 1022. Up to 122 conditions per place. [2023-11-19 07:49:32,962 INFO L140 encePairwiseOnDemand]: 467/479 looper letters, 69 selfloop transitions, 19 changer transitions 10/98 dead transitions. [2023-11-19 07:49:32,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 98 transitions, 570 flow [2023-11-19 07:49:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2163 transitions. [2023-11-19 07:49:32,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41051432909470487 [2023-11-19 07:49:32,973 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2163 transitions. [2023-11-19 07:49:32,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2163 transitions. [2023-11-19 07:49:32,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:32,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2163 transitions. [2023-11-19 07:49:32,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.63636363636363) internal successors, (2163), 11 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,997 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:32,998 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 179 flow. Second operand 11 states and 2163 transitions. [2023-11-19 07:49:32,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 98 transitions, 570 flow [2023-11-19 07:49:33,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 98 transitions, 546 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:33,008 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 276 flow [2023-11-19 07:49:33,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=276, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-19 07:49:33,011 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-11-19 07:49:33,011 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 276 flow [2023-11-19 07:49:33,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:33,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:33,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:49:33,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1586080707, now seen corresponding path program 3 times [2023-11-19 07:49:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298450291] [2023-11-19 07:49:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:33,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:33,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298450291] [2023-11-19 07:49:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298450291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416060364] [2023-11-19 07:49:33,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:33,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:33,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-19 07:49:33,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 276 flow. Second operand has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:33,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:33,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-19 07:49:33,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:34,251 INFO L124 PetriNetUnfolderBase]: 192/348 cut-off events. [2023-11-19 07:49:34,251 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-11-19 07:49:34,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 348 events. 192/348 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1253 event pairs, 26 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 1087. Up to 116 conditions per place. [2023-11-19 07:49:34,256 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 76 selfloop transitions, 18 changer transitions 7/101 dead transitions. [2023-11-19 07:49:34,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 649 flow [2023-11-19 07:49:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2140 transitions. [2023-11-19 07:49:34,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061491744163978 [2023-11-19 07:49:34,268 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2140 transitions. [2023-11-19 07:49:34,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2140 transitions. [2023-11-19 07:49:34,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:34,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2140 transitions. [2023-11-19 07:49:34,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.54545454545453) internal successors, (2140), 11 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,292 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,292 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 276 flow. Second operand 11 states and 2140 transitions. [2023-11-19 07:49:34,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 649 flow [2023-11-19 07:49:34,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 580 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-19 07:49:34,302 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 266 flow [2023-11-19 07:49:34,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=266, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-19 07:49:34,305 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-11-19 07:49:34,306 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 266 flow [2023-11-19 07:49:34,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:34,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:34,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:34,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:49:34,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:34,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:34,309 INFO L85 PathProgramCache]: Analyzing trace with hash -780051967, now seen corresponding path program 4 times [2023-11-19 07:49:34,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:34,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765083346] [2023-11-19 07:49:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:34,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:34,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:34,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765083346] [2023-11-19 07:49:34,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765083346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:34,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244706900] [2023-11-19 07:49:34,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:34,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:34,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:35,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-19 07:49:35,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 266 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:35,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-19 07:49:35,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:35,523 INFO L124 PetriNetUnfolderBase]: 172/328 cut-off events. [2023-11-19 07:49:35,523 INFO L125 PetriNetUnfolderBase]: For 357/357 co-relation queries the response was YES. [2023-11-19 07:49:35,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 328 events. 172/328 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1218 event pairs, 38 based on Foata normal form. 19/324 useless extension candidates. Maximal degree in co-relation 1069. Up to 83 conditions per place. [2023-11-19 07:49:35,527 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 75 selfloop transitions, 17 changer transitions 9/101 dead transitions. [2023-11-19 07:49:35,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 629 flow [2023-11-19 07:49:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:49:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:49:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1979 transitions. [2023-11-19 07:49:35,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41315240083507304 [2023-11-19 07:49:35,535 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1979 transitions. [2023-11-19 07:49:35,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1979 transitions. [2023-11-19 07:49:35,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:35,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1979 transitions. [2023-11-19 07:49:35,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 197.9) internal successors, (1979), 10 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,556 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 479.0) internal successors, (5269), 11 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,557 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 266 flow. Second operand 10 states and 1979 transitions. [2023-11-19 07:49:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 629 flow [2023-11-19 07:49:35,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 101 transitions, 587 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-19 07:49:35,563 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 310 flow [2023-11-19 07:49:35,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=310, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-11-19 07:49:35,564 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-11-19 07:49:35,564 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 310 flow [2023-11-19 07:49:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:35,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:35,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:35,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:49:35,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:35,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash -153075609, now seen corresponding path program 5 times [2023-11-19 07:49:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447982005] [2023-11-19 07:49:35,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:35,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:36,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:36,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447982005] [2023-11-19 07:49:36,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447982005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:36,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:36,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462845571] [2023-11-19 07:49:36,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:36,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:36,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:36,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 479 [2023-11-19 07:49:36,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:36,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 479 [2023-11-19 07:49:36,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:36,685 INFO L124 PetriNetUnfolderBase]: 172/326 cut-off events. [2023-11-19 07:49:36,685 INFO L125 PetriNetUnfolderBase]: For 664/664 co-relation queries the response was YES. [2023-11-19 07:49:36,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1193 conditions, 326 events. 172/326 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1196 event pairs, 37 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 1075. Up to 76 conditions per place. [2023-11-19 07:49:36,689 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 78 selfloop transitions, 18 changer transitions 5/101 dead transitions. [2023-11-19 07:49:36,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 668 flow [2023-11-19 07:49:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2161 transitions. [2023-11-19 07:49:36,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410134750427026 [2023-11-19 07:49:36,699 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2161 transitions. [2023-11-19 07:49:36,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2161 transitions. [2023-11-19 07:49:36,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:36,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2161 transitions. [2023-11-19 07:49:36,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 196.45454545454547) internal successors, (2161), 11 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,720 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,720 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 310 flow. Second operand 11 states and 2161 transitions. [2023-11-19 07:49:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 668 flow [2023-11-19 07:49:36,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 101 transitions, 626 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-19 07:49:36,728 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 328 flow [2023-11-19 07:49:36,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-11-19 07:49:36,729 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2023-11-19 07:49:36,729 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 328 flow [2023-11-19 07:49:36,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 189.875) internal successors, (1519), 8 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:36,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:49:36,731 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:36,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash -142966627, now seen corresponding path program 6 times [2023-11-19 07:49:36,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:36,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638723922] [2023-11-19 07:49:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:36,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638723922] [2023-11-19 07:49:37,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638723922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:37,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:37,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:49:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676838857] [2023-11-19 07:49:37,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:37,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:49:37,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:37,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:49:37,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:49:37,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-19 07:49:37,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 328 flow. Second operand has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:37,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:37,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-19 07:49:37,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:37,895 INFO L124 PetriNetUnfolderBase]: 171/319 cut-off events. [2023-11-19 07:49:37,895 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-11-19 07:49:37,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 319 events. 171/319 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1147 event pairs, 37 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 1135. Up to 119 conditions per place. [2023-11-19 07:49:37,900 INFO L140 encePairwiseOnDemand]: 470/479 looper letters, 73 selfloop transitions, 18 changer transitions 5/96 dead transitions. [2023-11-19 07:49:37,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 644 flow [2023-11-19 07:49:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2134 transitions. [2023-11-19 07:49:37,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40501043841336115 [2023-11-19 07:49:37,909 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2134 transitions. [2023-11-19 07:49:37,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2134 transitions. [2023-11-19 07:49:37,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:37,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2134 transitions. [2023-11-19 07:49:37,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.0) internal successors, (2134), 11 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:37,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:37,931 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:37,931 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 328 flow. Second operand 11 states and 2134 transitions. [2023-11-19 07:49:37,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 644 flow [2023-11-19 07:49:37,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 604 flow, removed 4 selfloop flow, removed 8 redundant places. [2023-11-19 07:49:37,939 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 318 flow [2023-11-19 07:49:37,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=318, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-11-19 07:49:37,940 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-19 07:49:37,940 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 318 flow [2023-11-19 07:49:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.875) internal successors, (1503), 8 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:37,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:37,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:49:37,941 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:37,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash -848543040, now seen corresponding path program 1 times [2023-11-19 07:49:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:37,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133741213] [2023-11-19 07:49:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133741213] [2023-11-19 07:49:38,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133741213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281414489] [2023-11-19 07:49:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:38,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:38,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:38,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:38,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:49:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:38,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:49:38,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:39,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:39,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 97 [2023-11-19 07:49:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:39,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:39,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:39,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-19 07:49:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:40,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281414489] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:40,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-19 07:49:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144826218] [2023-11-19 07:49:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:49:41,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2023-11-19 07:49:41,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 318 flow. Second operand has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:41,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:41,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2023-11-19 07:49:41,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:42,321 INFO L124 PetriNetUnfolderBase]: 365/684 cut-off events. [2023-11-19 07:49:42,321 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-11-19 07:49:42,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 684 events. 365/684 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3135 event pairs, 56 based on Foata normal form. 17/651 useless extension candidates. Maximal degree in co-relation 2410. Up to 158 conditions per place. [2023-11-19 07:49:42,330 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 93 selfloop transitions, 42 changer transitions 8/143 dead transitions. [2023-11-19 07:49:42,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 143 transitions, 1088 flow [2023-11-19 07:49:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:49:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:49:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2244 transitions. [2023-11-19 07:49:42,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903966597077244 [2023-11-19 07:49:42,340 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2244 transitions. [2023-11-19 07:49:42,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2244 transitions. [2023-11-19 07:49:42,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:42,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2244 transitions. [2023-11-19 07:49:42,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 187.0) internal successors, (2244), 12 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:42,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:42,362 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:42,362 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 318 flow. Second operand 12 states and 2244 transitions. [2023-11-19 07:49:42,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 143 transitions, 1088 flow [2023-11-19 07:49:42,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 143 transitions, 984 flow, removed 7 selfloop flow, removed 12 redundant places. [2023-11-19 07:49:42,374 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 650 flow [2023-11-19 07:49:42,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=650, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-11-19 07:49:42,375 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 46 predicate places. [2023-11-19 07:49:42,375 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 650 flow [2023-11-19 07:49:42,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:42,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:42,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:42,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:42,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:49:42,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:42,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:42,604 INFO L85 PathProgramCache]: Analyzing trace with hash -712860998, now seen corresponding path program 2 times [2023-11-19 07:49:42,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:42,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398686096] [2023-11-19 07:49:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:42,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:43,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398686096] [2023-11-19 07:49:43,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398686096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:43,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130684130] [2023-11-19 07:49:43,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:49:43,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:43,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:43,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:43,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:49:43,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 07:49:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:43,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:49:43,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:43,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:43,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 99 [2023-11-19 07:49:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:49:43,499 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130684130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:43,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:43,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-19 07:49:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019700928] [2023-11-19 07:49:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:49:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-19 07:49:43,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 650 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:43,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:43,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-19 07:49:43,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:44,147 INFO L124 PetriNetUnfolderBase]: 360/675 cut-off events. [2023-11-19 07:49:44,147 INFO L125 PetriNetUnfolderBase]: For 2257/2257 co-relation queries the response was YES. [2023-11-19 07:49:44,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 675 events. 360/675 cut-off events. For 2257/2257 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3064 event pairs, 66 based on Foata normal form. 1/628 useless extension candidates. Maximal degree in co-relation 2328. Up to 330 conditions per place. [2023-11-19 07:49:44,158 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 71 selfloop transitions, 33 changer transitions 11/115 dead transitions. [2023-11-19 07:49:44,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 115 transitions, 1055 flow [2023-11-19 07:49:44,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:49:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:49:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1749 transitions. [2023-11-19 07:49:44,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057063326374391 [2023-11-19 07:49:44,167 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1749 transitions. [2023-11-19 07:49:44,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1749 transitions. [2023-11-19 07:49:44,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:44,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1749 transitions. [2023-11-19 07:49:44,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.33333333333334) internal successors, (1749), 9 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:44,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:44,185 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:44,185 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 650 flow. Second operand 9 states and 1749 transitions. [2023-11-19 07:49:44,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 115 transitions, 1055 flow [2023-11-19 07:49:44,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 115 transitions, 1018 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-11-19 07:49:44,206 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 689 flow [2023-11-19 07:49:44,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=689, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2023-11-19 07:49:44,207 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-19 07:49:44,207 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 689 flow [2023-11-19 07:49:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:44,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:44,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:44,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:44,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:44,430 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:44,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:44,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2007295210, now seen corresponding path program 3 times [2023-11-19 07:49:44,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:44,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25840495] [2023-11-19 07:49:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:44,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:44,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25840495] [2023-11-19 07:49:44,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25840495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:44,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951454945] [2023-11-19 07:49:44,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:49:44,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:44,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:44,807 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:44,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:49:44,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-19 07:49:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:44,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:49:44,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:45,178 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:45,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-19 07:49:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:49:45,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951454945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:45,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-19 07:49:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422106537] [2023-11-19 07:49:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:45,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:49:45,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-19 07:49:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 689 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:45,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:45,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-19 07:49:45,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:45,856 INFO L124 PetriNetUnfolderBase]: 361/680 cut-off events. [2023-11-19 07:49:45,856 INFO L125 PetriNetUnfolderBase]: For 2319/2319 co-relation queries the response was YES. [2023-11-19 07:49:45,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 680 events. 361/680 cut-off events. For 2319/2319 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3120 event pairs, 56 based on Foata normal form. 1/631 useless extension candidates. Maximal degree in co-relation 2708. Up to 322 conditions per place. [2023-11-19 07:49:45,864 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 75 selfloop transitions, 36 changer transitions 5/116 dead transitions. [2023-11-19 07:49:45,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 116 transitions, 1079 flow [2023-11-19 07:49:45,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:49:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:49:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1751 transitions. [2023-11-19 07:49:45,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061702621201577 [2023-11-19 07:49:45,872 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1751 transitions. [2023-11-19 07:49:45,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1751 transitions. [2023-11-19 07:49:45,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:45,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1751 transitions. [2023-11-19 07:49:45,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.55555555555554) internal successors, (1751), 9 states have internal predecessors, (1751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:45,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:45,888 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:45,889 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 689 flow. Second operand 9 states and 1751 transitions. [2023-11-19 07:49:45,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 116 transitions, 1079 flow [2023-11-19 07:49:45,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 116 transitions, 997 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-11-19 07:49:45,917 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 703 flow [2023-11-19 07:49:45,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=703, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2023-11-19 07:49:45,919 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-11-19 07:49:45,919 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 703 flow [2023-11-19 07:49:45,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:45,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:45,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:45,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:46,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:49:46,139 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:46,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:46,139 INFO L85 PathProgramCache]: Analyzing trace with hash -73242358, now seen corresponding path program 4 times [2023-11-19 07:49:46,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743553496] [2023-11-19 07:49:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:46,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:46,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:46,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743553496] [2023-11-19 07:49:46,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743553496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226618737] [2023-11-19 07:49:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:49:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:46,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:46,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:49:46,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:49:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:46,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:49:46,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:46,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:47,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:47,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-19 07:49:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226618737] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-19 07:49:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823175419] [2023-11-19 07:49:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:49:48,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 479 [2023-11-19 07:49:48,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 703 flow. Second operand has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:48,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:48,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 479 [2023-11-19 07:49:48,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:49,466 INFO L124 PetriNetUnfolderBase]: 341/660 cut-off events. [2023-11-19 07:49:49,467 INFO L125 PetriNetUnfolderBase]: For 2198/2198 co-relation queries the response was YES. [2023-11-19 07:49:49,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 660 events. 341/660 cut-off events. For 2198/2198 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3089 event pairs, 77 based on Foata normal form. 19/629 useless extension candidates. Maximal degree in co-relation 2574. Up to 164 conditions per place. [2023-11-19 07:49:49,475 INFO L140 encePairwiseOnDemand]: 468/479 looper letters, 86 selfloop transitions, 38 changer transitions 9/133 dead transitions. [2023-11-19 07:49:49,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1184 flow [2023-11-19 07:49:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:49:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:49:49,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2055 transitions. [2023-11-19 07:49:49,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39001708104004557 [2023-11-19 07:49:49,480 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2055 transitions. [2023-11-19 07:49:49,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2055 transitions. [2023-11-19 07:49:49,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:49,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2055 transitions. [2023-11-19 07:49:49,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 186.8181818181818) internal successors, (2055), 11 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:49,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:49,497 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 479.0) internal successors, (5748), 12 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:49,497 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 703 flow. Second operand 11 states and 2055 transitions. [2023-11-19 07:49:49,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1184 flow [2023-11-19 07:49:49,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 133 transitions, 1108 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-11-19 07:49:49,513 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 820 flow [2023-11-19 07:49:49,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=820, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-11-19 07:49:49,514 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 61 predicate places. [2023-11-19 07:49:49,514 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 820 flow [2023-11-19 07:49:49,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 179.6) internal successors, (1796), 10 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:49,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:49,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:49,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:49,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:49:49,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:49,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 548515770, now seen corresponding path program 5 times [2023-11-19 07:49:49,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:49,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22631781] [2023-11-19 07:49:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:50,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22631781] [2023-11-19 07:49:50,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22631781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:50,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280787478] [2023-11-19 07:49:50,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:49:50,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:50,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:50,115 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:50,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:49:50,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:49:50,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:50,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 07:49:50,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:50,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:50,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-19 07:49:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:50,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:50,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:50,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2023-11-19 07:49:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:51,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280787478] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2023-11-19 07:49:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200856800] [2023-11-19 07:49:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:51,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-11-19 07:49:51,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 479 [2023-11-19 07:49:51,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 820 flow. Second operand has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:51,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:51,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 479 [2023-11-19 07:49:51,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:52,598 INFO L124 PetriNetUnfolderBase]: 341/658 cut-off events. [2023-11-19 07:49:52,598 INFO L125 PetriNetUnfolderBase]: For 2843/2843 co-relation queries the response was YES. [2023-11-19 07:49:52,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 658 events. 341/658 cut-off events. For 2843/2843 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3061 event pairs, 76 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 2693. Up to 158 conditions per place. [2023-11-19 07:49:52,607 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 88 selfloop transitions, 40 changer transitions 5/133 dead transitions. [2023-11-19 07:49:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1256 flow [2023-11-19 07:49:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:49:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:49:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2239 transitions. [2023-11-19 07:49:52,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389526791927627 [2023-11-19 07:49:52,614 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2239 transitions. [2023-11-19 07:49:52,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2239 transitions. [2023-11-19 07:49:52,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:52,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2239 transitions. [2023-11-19 07:49:52,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 186.58333333333334) internal successors, (2239), 12 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:52,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:52,638 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:52,638 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 820 flow. Second operand 12 states and 2239 transitions. [2023-11-19 07:49:52,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1256 flow [2023-11-19 07:49:52,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1199 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-11-19 07:49:52,662 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 871 flow [2023-11-19 07:49:52,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=871, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2023-11-19 07:49:52,664 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2023-11-19 07:49:52,664 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 871 flow [2023-11-19 07:49:52,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 180.6) internal successors, (1806), 10 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:52,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:52,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:52,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:49:52,882 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:52,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash 558624752, now seen corresponding path program 6 times [2023-11-19 07:49:52,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:52,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472205276] [2023-11-19 07:49:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:52,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472205276] [2023-11-19 07:49:53,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472205276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:53,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991519356] [2023-11-19 07:49:53,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:49:53,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:53,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:53,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:53,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:49:53,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-19 07:49:53,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:49:53,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:49:53,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:53,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:49:53,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 95 [2023-11-19 07:49:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:49:53,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:49:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991519356] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:49:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-19 07:49:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302991068] [2023-11-19 07:49:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:53,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:49:53,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:49:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:49:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 479 [2023-11-19 07:49:53,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 871 flow. Second operand has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:53,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:53,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 479 [2023-11-19 07:49:53,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:54,329 INFO L124 PetriNetUnfolderBase]: 340/651 cut-off events. [2023-11-19 07:49:54,330 INFO L125 PetriNetUnfolderBase]: For 2764/2764 co-relation queries the response was YES. [2023-11-19 07:49:54,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 651 events. 340/651 cut-off events. For 2764/2764 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3000 event pairs, 76 based on Foata normal form. 1/600 useless extension candidates. Maximal degree in co-relation 2795. Up to 303 conditions per place. [2023-11-19 07:49:54,338 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 79 selfloop transitions, 36 changer transitions 5/120 dead transitions. [2023-11-19 07:49:54,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1230 flow [2023-11-19 07:49:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:49:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:49:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1750 transitions. [2023-11-19 07:49:54,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40593829737879844 [2023-11-19 07:49:54,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1750 transitions. [2023-11-19 07:49:54,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1750 transitions. [2023-11-19 07:49:54,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:54,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1750 transitions. [2023-11-19 07:49:54,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 194.44444444444446) internal successors, (1750), 9 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:54,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:54,358 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:54,358 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 871 flow. Second operand 9 states and 1750 transitions. [2023-11-19 07:49:54,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1230 flow [2023-11-19 07:49:54,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 1157 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-19 07:49:54,381 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 878 flow [2023-11-19 07:49:54,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=878, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2023-11-19 07:49:54,382 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-11-19 07:49:54,383 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 878 flow [2023-11-19 07:49:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 187.77777777777777) internal successors, (1690), 9 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:54,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:54,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:54,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:54,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:49:54,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:54,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:54,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1715580094, now seen corresponding path program 1 times [2023-11-19 07:49:54,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:54,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437600538] [2023-11-19 07:49:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:54,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:54,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437600538] [2023-11-19 07:49:54,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437600538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:54,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615028766] [2023-11-19 07:49:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:54,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:54,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:54,790 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:54,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:49:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:54,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:49:54,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:54,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615028766] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:55,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-11-19 07:49:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823937943] [2023-11-19 07:49:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:49:55,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:49:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:49:55,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 479 [2023-11-19 07:49:55,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:55,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:55,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 479 [2023-11-19 07:49:55,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:55,620 INFO L124 PetriNetUnfolderBase]: 350/664 cut-off events. [2023-11-19 07:49:55,620 INFO L125 PetriNetUnfolderBase]: For 3490/3490 co-relation queries the response was YES. [2023-11-19 07:49:55,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 664 events. 350/664 cut-off events. For 3490/3490 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3178 event pairs, 69 based on Foata normal form. 8/620 useless extension candidates. Maximal degree in co-relation 2886. Up to 168 conditions per place. [2023-11-19 07:49:55,628 INFO L140 encePairwiseOnDemand]: 469/479 looper letters, 96 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2023-11-19 07:49:55,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 130 transitions, 1412 flow [2023-11-19 07:49:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:49:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-19 07:49:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1816 transitions. [2023-11-19 07:49:55,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124797030851313 [2023-11-19 07:49:55,633 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1816 transitions. [2023-11-19 07:49:55,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1816 transitions. [2023-11-19 07:49:55,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:55,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1816 transitions. [2023-11-19 07:49:55,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.77777777777777) internal successors, (1816), 9 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:55,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:55,644 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 479.0) internal successors, (4790), 10 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:55,645 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 878 flow. Second operand 9 states and 1816 transitions. [2023-11-19 07:49:55,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 130 transitions, 1412 flow [2023-11-19 07:49:55,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 1302 flow, removed 5 selfloop flow, removed 8 redundant places. [2023-11-19 07:49:55,661 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 882 flow [2023-11-19 07:49:55,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=882, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-11-19 07:49:55,662 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 67 predicate places. [2023-11-19 07:49:55,662 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 882 flow [2023-11-19 07:49:55,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.42857142857142) internal successors, (1368), 7 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:55,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:55,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:55,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:49:55,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:49:55,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:55,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:55,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1202464333, now seen corresponding path program 1 times [2023-11-19 07:49:55,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:55,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715273634] [2023-11-19 07:49:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:55,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:55,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:55,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715273634] [2023-11-19 07:49:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715273634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:49:55,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:49:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:49:55,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360232233] [2023-11-19 07:49:55,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:49:55,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:55,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:49:55,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:49:56,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 479 [2023-11-19 07:49:56,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 882 flow. Second operand has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:49:56,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 479 [2023-11-19 07:49:56,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:49:56,271 INFO L124 PetriNetUnfolderBase]: 200/398 cut-off events. [2023-11-19 07:49:56,271 INFO L125 PetriNetUnfolderBase]: For 1678/1678 co-relation queries the response was YES. [2023-11-19 07:49:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1851 conditions, 398 events. 200/398 cut-off events. For 1678/1678 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1611 event pairs, 113 based on Foata normal form. 28/424 useless extension candidates. Maximal degree in co-relation 1729. Up to 329 conditions per place. [2023-11-19 07:49:56,275 INFO L140 encePairwiseOnDemand]: 474/479 looper letters, 48 selfloop transitions, 2 changer transitions 28/78 dead transitions. [2023-11-19 07:49:56,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 78 transitions, 846 flow [2023-11-19 07:49:56,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:49:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:49:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1040 transitions. [2023-11-19 07:49:56,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342379958246347 [2023-11-19 07:49:56,280 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1040 transitions. [2023-11-19 07:49:56,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1040 transitions. [2023-11-19 07:49:56,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:49:56,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1040 transitions. [2023-11-19 07:49:56,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 208.0) internal successors, (1040), 5 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,287 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 479.0) internal successors, (2874), 6 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,287 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 882 flow. Second operand 5 states and 1040 transitions. [2023-11-19 07:49:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 78 transitions, 846 flow [2023-11-19 07:49:56,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 78 transitions, 787 flow, removed 11 selfloop flow, removed 8 redundant places. [2023-11-19 07:49:56,303 INFO L231 Difference]: Finished difference. Result has 85 places, 50 transitions, 382 flow [2023-11-19 07:49:56,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=85, PETRI_TRANSITIONS=50} [2023-11-19 07:49:56,304 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-11-19 07:49:56,304 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 50 transitions, 382 flow [2023-11-19 07:49:56,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:49:56,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:49:56,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:49:56,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:49:56,306 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:49:56,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:49:56,306 INFO L85 PathProgramCache]: Analyzing trace with hash 747242498, now seen corresponding path program 1 times [2023-11-19 07:49:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:49:56,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647340719] [2023-11-19 07:49:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:56,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:49:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:56,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:49:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647340719] [2023-11-19 07:49:56,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647340719] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:56,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393424796] [2023-11-19 07:49:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:49:56,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:49:56,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:56,955 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:49:56,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c5d0485-c675-4639-86d6-75c23efda04f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:49:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:49:57,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:49:57,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:49:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:57,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:49:57,598 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2023-11-19 07:49:57,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 48 [2023-11-19 07:49:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:49:57,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393424796] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:49:57,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:49:57,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2023-11-19 07:49:57,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530888981] [2023-11-19 07:49:57,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:49:57,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:49:57,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:49:57,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:49:57,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506